package com.cachemanage.config;

import org.springframework.boot.autoconfigure.cache.CacheProperties;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;

import java.lang.reflect.Method;

@Configuration
public class RedisConfig {
	@Bean
	public RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties){
		CacheProperties.Redis redisProperties=cacheProperties.getRedis();
		//获取在配置文件中的配置信息
		RedisCacheConfiguration config= RedisCacheConfiguration.defaultCacheConfig();
		config=config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));
		//将缓存序列化信息指定为JSON
		if (redisProperties.getTimeToLive() != null) {
			config=config.entryTtl(redisProperties.getTimeToLive());
		}
		if (redisProperties.getKeyPrefix() != null) {
			config=config.prefixCacheNameWith(redisProperties.getKeyPrefix());
		}
		if (!redisProperties.isCacheNullValues()) {
			config=config.disableCachingNullValues();
		}
		if (!redisProperties.isUseKeyPrefix()) {
			config=config.disableKeyPrefix();
		}
		//设置在配置文件中的各项配置，如过期时间
		return config;
	}
	@Bean
	public KeyGenerator bookSearchGenerator(){
		KeyGenerator keyGenerator=new KeyGenerator() {
			@Override
			public Object generate(Object target, Method method, Object... params) {
				StringBuilder sb=new StringBuilder();
				for (Object param : params) {
					sb.append(param.toString());
				}
				return sb.toString();
			}
		};
		return keyGenerator;
	}
}
